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Freeview Light on the Greenwich (Greater London, England) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.484,0.026 or 51°29'3"N 0°1'35"Esa_postcodeSE7 7NJ

 

The symbol shows the location of the Greenwich (Greater London, England) transmitter which serves 2,200 homes. The bright green areas shown where the signal from this transmitter is strong, dark green areas are poorer signals. Those parts shown in yellow may have interference on the same frequency from other masts.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Greenwich (Greater London, England) transmitter.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
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Which Freeview channels does the Greenwich transmitter broadcast?

If you have any kind of Freeview fault, follow this Freeview reset procedure first.

Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 V max
C40 (626.0MHz)45mDTG-33W
Channel icons
1 BBC One (SD) London, 2 BBC Two England, 9 BBC Four, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 15 others

PSB2
D3+4
 V max
C43 (650.0MHz)45mDTG-33W
Channel icons
3 ITV (SD) (London), 4 Channel 4 (SD) London ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 London ads, 18 More4, 25 ITV4, 29 E4 +1, 34 ITV +1 (London),

PSB3
BBCB
 V max
C46 (674.0MHz)45mDTG-63W
Channel icons
72 Shopping Quarter , 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV London), 104 Channel 4 HD London ads, 105 Channel 5 HD, 204 CBBC HD, plus 1 others

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
H/V: aerial position (horizontal or vertical)

Are you trying to watch these 50 Freeview channels?

the effected channels
the effected channels
the effected channels
the effected channels

The Greenwich (Greater London, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: 4Music, 4seven, 5SELECT, 5STAR, 5USA, Aljazeera English, BBC Four HD, BBC News HD, Blaze, Blaze +1, CBeebies HD, CBS Drama, CBS Justice, CBS Reality, Challenge, Channel 5 +1, CITV, Dave, Dave ja vu, DMAX, Drama +1, Film4 +1, Food Network, Forces TV, FreeSports HD, HGTV, Horror Channel, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Together TV +1, More4 +1, NOW 80s, Paramount Network, PBS America +1, pick, Quest +1, Quest Red, Quest Red +1, Really, RT HD, Sky Arts, Sky News, Smithsonian Channel, Sony Movies Action, Talking Pictures TV, TCC, Together TV, Yesterday +1.

If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.

Which BBC and ITV regional news can I watch from the Greenwich transmitter?

regional news image
BBC London 4.9m homes 18.4%
from London W1A 1AA, 12km west-northwest (286°)
to BBC London region - 55 masts.
regional news image
ITV London News 4.9m homes 18.4%
from London WC1X 8XZ, 11km west-northwest (293°)
to ITV London region - 55 masts.

How will the Greenwich (Greater London, England) transmission frequencies change over time?

1984-971997-981998-20122012-1321 Mar 2018
C/D E TC/D E TC/D E TB E K TB E K T
C40BBCA
C41D3+4
C43D3+4
C44BBCA
C46BBCB
C47BBCB
C48C4wavesC4wavesC4waves
C50tv_offBBC2wavesBBC2wavesBBC2waves
C52tv_offITVwavesITVwavesITVwaves
C56tv_offBBC1wavesBBC1wavesBBC1waves

tv_off Being removed from Freeview (for 5G use) after November 2020 - more
Table shows multiplexes names see this article;
green background for transmission frequencies
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W T
waves denotes analogue; digital switchover was 4 Apr 12 and 18 Apr 12.

How do the old analogue and currrent digital signal levels compare?

Analogue 1-4 15W
BBCA, D3+4, BBCB(-7dB) 3W

Which companies have run the Channel 3 services in the Crystal Palace transmitter area

Sep 1955-Jul 1968Associated-Rediffusion†
Sep 1955-Jul 1968Associated TeleVision◊
Jul 1968-Dec 1992Thames†
Jul 1968-Feb 2004London Weekend Television♦
Jan 1993-Feb 2004Carlton†
Feb 2004-Dec 2014ITV plc†
Feb 2004-Dec 2014ITV plc♦
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Greenwich was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Comments
Sunday, 16 December 2012
Dave Lindsay
sentiment_very_satisfiedPlatinum

1:23 PM

brian manley: I have drawn up the following list of transmitters that probably overlap with Greenwich to some degree:

48H Kensal Town
49H Alexandra Palace
50V Lea Bridge
52H Kensal Town
53V Woolwich
54H Alexandra Palace
55V Lea Bridge
56H Kensal Town
57V Woolwich
58H Alexandra Palace
59V Lea Bridge
60V Woolwich

The others seem definately likely, but I included Lea Bridge as it was the only other one that fitted in. It is definately a "maybe" as it's only 2W and not directed towards Greenwich. The only thing we do know is that it wasn't co-channel with Greenwich pre-DSO and isn't co-channel now.

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Dave Lindsay's 5,724 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

3:38 PM

brian manley: If I could just add to what has already been said, insomuch that its unfortunate that you have just moved into the area because if anyone receiving Greenwich on pre-changeover frequencies was doing so with a signal level of around 55% or above then there was no need for them to change aerials, as in practical terms the signal level difference with the change of frequency would under normal circumstances be quite insignificant.

This really applies to any similar types of situations, as its only in cases where a persons reception is inclined to be on the iffy side that strict adherence to aerial band groups really makes any difference, although I will admit that even in iffy cases the difference in levels seen is always more significant in situation where reception is at a lower frequency than the aerial is designed for, such as applies in your case and why I qualified what I mentioned by stating the 55% and above level.

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jb38's 7,179 posts GB
Tuesday, 18 December 2012
B
brian
sentiment_satisfiedBronze

3:10 PM

Thanks to both of you for your reply.

Dave, excellent detective work on Lea Bridge and thanks for taking the time to look on Streetview for me. You are right, all the aerials near me look at CP (although there are even 1 or 2 looking at Poplar close by).

There is not a problem at my location with CP reception (although it?EUR(TM)s not great).My main problem is I moved into the house and someone has chopped the coax off at the window frame so I have now connected it up to a fly lead going to the TV with a pin till I can figure a better solution!

I take your point on a lack of C/D frequencies too. Add to the possible nuisance list Hemel on 50,55 and 59 and Sandy on 48,51 and 52 and there may be not much space that (now squashed) end of the band!

A bigger problem I think would be that a fair few of the relay aerials installed have been done so horizontally (in error I presume) so when there is a lift Sudbury may knock the signal out unless you are right on top of the relay.

I still cannot help but think Sudbury would cause more of a problem than a 2 watt transmitter 6 miles away.

I wonder if SFN?EUR(TM)s work for relays. If so, just as easy to have made Greenwich 53,57 and 60 with Woolwich.



link to this comment
brian's 32 posts GB
Dave Lindsay
sentiment_very_satisfiedPlatinum

5:13 PM

brian: There are a few horizontally polarised relays; Kensal Town and Alexandra Palace are both so.

Probably two male F-connectors with a back-to-back female adaptor covered in self amalgamating tape to waterproof it:

Satellite, Television, FM, DAB, Aerial, Coaxial Cable, Plugs, Sockets, Connectors & Leads

Make sure that it is covered entirely and that no water can get in.

link to this comment
Dave Lindsay's 5,724 posts GB
Wednesday, 19 December 2012
B
brian
sentiment_satisfiedBronze

4:32 PM

Thanks Dave.

Agreed there are a few horizontal relays around London due to frequency clashes. My point was that there are a fair few horizontal aerials looking at Greenwich which should of been put up the other way round !

The F connector solution came a couple of hours too late. Bloke turned up with masonary drill this AM and my Dad gave him £55 for his efforts. (Girlfriend was getting restless over pixilated xmas viewing but thanks anyway).

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brian's 32 posts GB
Thursday, 20 December 2012
B
brian
sentiment_satisfiedBronze

8:38 AM

I checked all 6 CP MUX's last night after the rigger had connected it up (looks like he did what Dave suggested) and signal levels are high but channel D26 (ITV etc) breaks up.
Could I ask :

Does digital suffer from multipath like analogue did (they are building big flats by the river near me)?

Is it at all possible that there is too much RF signal (it passes through a DVD which I think amplifies it at bit)? D26 is right in the middle of the 6 CP channels so could be getting splattered ? I put an amp on it and that made it worse.

Just do not want to spend £100 getting him round when I can spend £3? on an attenuator.

link to this comment
brian's 32 posts GB
Dave Lindsay
sentiment_very_satisfiedPlatinum

9:23 AM

brian: I think that getting an attenuator would be the best bet.

You are only 5.6 miles from the transmitter and the terrain plot suggests that it might be visible from your rooftop. So yes, too much signal is a possibility.

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Dave Lindsay's 5,724 posts GB
B
brian
sentiment_satisfiedBronze

9:32 AM

Thanks Dave. A trip to Maplin's beckons.
I kept the bad news from the girlfriend last night

link to this comment
brian's 32 posts GB
B
brian
sentiment_satisfiedBronze

9:36 AM

..Sorry, got cut off mid flow. I was going to say if that is the case then I can not be alone. I am at 2 metres AOD and just about everyone has a roof top aerial. If it's happening to me it must be happening to plenty of other folks. My set up (with a splice) is far from efficient !

link to this comment
brian's 32 posts GB
Dave Lindsay
sentiment_very_satisfiedPlatinum

9:39 AM

brian: eBay has variable ones for £3.15 (other suppliers and models are available):

TV Aerial Attenuator Variable 0-20Db Freeview Digital | eBay

Granted, you may be pushing it to get it before Christmas! Failing that, maybe you can find a seller that is local to you and which will allow collection.

Or by connecting the centre conductor without the screen might reduce the level enough (until you get a proper attenuator).

link to this comment
Dave Lindsay's 5,724 posts GB
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